Zone 6b planting calendar

What to plant in September: zone 6b

A rule-of-thumb starting point for zone 6b: last spring frost around April 25, first fall frost around October 15. Zones are set by winter lows, not frost dates, so two gardens in the same zone can be weeks apart. Measure your ZIP below for dates from your area's own 30-year record.

These are zone-average dates. Check an area-level frost estimate from thirty years of nearby weather history and this calendar retimes itself.
Typical last frost: April 25
Typical first frost: October 15
Winter lows: -5 to 0 °F
Zone 6b Almanac. What growers here actually recorded: sowing weeks, days to first pick, and yields.

Transplant for fall

  • Kalearound Sep 1

    Last safe transplant date to mature (55 days) before frost on 10-15.

Direct sow for fall

  • Radish2 sowings: Sep 12 and Sep 26

    Succession sowing 2 of 3. Sow every 14 days for a steady cut. Sowing again a few weeks later keeps the harvest coming instead of arriving all at once.

  • Spinacharound Sep 16

    Counts back 40 days from your first frost. Frost-hardy: light freezes sweeten it.

Sow cover crop

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